Name: CVE-2023-4255: Out-of-bounds Write
Creator: Rapid7
Published: 2023-12-21T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2023-4255, CWE-787, CVSS 5.5, EPSS 0.00016

An out-of-bounds write issue has been discovered in the backspace handling of the checkType() function in etc.c within the W3M application. This vulnerability is triggered by supplying a specially crafted HTML file to the w3m binary. Exploitation of this flaw could lead to application crashes, resulting in a denial of service condition.

CVSS Details

CVSS 3.1 Base Score: 5.5
CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Debian	—	Upgrade w3m	May 15, 2025	Dec 21, 2023
Suse	—	Upgrade w3m	Jan 3, 2024	Dec 21, 2023
Ubuntu	—	Upgrade w3m (Ubuntu Pro)Upgrade w3m	Jan 16, 2024	Dec 21, 2023

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CVSS Details

Covered by Rapid7

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